#!/bin/sh -e ### BEGIN INIT INFO # Provides: udev # Required-Start: mountkernfs # Required-Stop: # Default-Start: S # Default-Stop: # Short-Description: Start udevd, populate /dev and load drivers. ### END INIT INFO # we need to unmount /dev/pts/ and remount it later over the devtmpfs unmount_devpts() { if mountpoint -q /dev/pts/; then umount -n -l /dev/pts/ fi if mountpoint -q /dev/shm/; then umount -n -l /dev/shm/ fi } # mount a devtmpfs over /dev, if somebody did not already do it mount_devtmpfs() { if grep -E -q "^[^[:space:]]+ /dev devtmpfs" /proc/mounts; then mount -n -o remount,size=$tmpfs_size,mode=0755 -t devtmpfs devtmpfs /dev return fi if ! mount -n -o size=$tmpfs_size,mode=0755 -t devtmpfs devtmpfs /dev; then log_failure_msg "udev requires devtmpfs support, not started" log_end_msg 1 fi return 0 } create_dev_makedev() { if [ -e /sbin/MAKEDEV ]; then ln -sf /sbin/MAKEDEV /dev/MAKEDEV else ln -sf /bin/true /dev/MAKEDEV fi } # If the initramfs does not have /run, the initramfs udev database must # be migrated from /dev/.udev/ to /run/udev/. move_udev_database() { [ -e "/dev/.udev/" ] || return 0 [ ! -e /run/udev/ ] || return 0 [ -e /run/ ] || return 0 mountpoint -q /run/ || return 0 mv /dev/.udev/ /run/udev/ || true } supported_kernel() { case "$(uname -r)" in 2.[012345].*|2.6.[0-9]|2.6.[0-9][!0-9]*) return 1 ;; 2.6.[12][0-9]|2.6.[12][0-9][!0-9]*) return 1 ;; 2.6.3[0-1]|2.6.3[0-1][!0-9]*) return 1 ;; esac return 0 } # shell version of /usr/bin/tty my_tty() { [ -x /bin/readlink ] || return 0 [ -e /proc/self/fd/0 ] || return 0 readlink --silent /proc/self/fd/0 || true } warn_if_interactive() { if [ "$RUNLEVEL" = "S" -a "$PREVLEVEL" = "N" ]; then return fi TTY=$(my_tty) if [ -z "$TTY" -o "$TTY" = "/dev/console" -o "$TTY" = "/dev/null" ]; then return fi printf "\n\n\nIt has been detected that the command\n\n\t$0 $*\n\n" printf "has been run from an interactive shell.\n" printf "It will probably not do what you expect, so this script will wait\n" printf "60 seconds before continuing. Press ^C to stop it.\n" printf "RUNNING THIS COMMAND IS HIGHLY DISCOURAGED!\n\n\n\n" sleep 60 } ############################################################################## [ -x /sbin/udevd ] || exit 0 PATH="/sbin:/bin" # defaults tmpfs_size="10M" if [ -e /etc/udev/udev.conf ]; then . /etc/udev/udev.conf fi . /lib/lsb/init-functions if ! supported_kernel; then log_failure_msg "udev requires a kernel >= 2.6.32, not started" log_end_msg 1 fi if [ ! -e /proc/filesystems ]; then log_failure_msg "udev requires a mounted procfs, not started" log_end_msg 1 fi if ! grep -q '[[:space:]]devtmpfs$' /proc/filesystems; then log_failure_msg "udev requires devtmpfs support, not started" log_end_msg 1 fi if [ ! -d /sys/class/ ]; then log_failure_msg "udev requires a mounted sysfs, not started" log_end_msg 1 fi if [ ! -e /sys/kernel/uevent_helper ]; then log_failure_msg "udev requires hotplug support, not started" log_end_msg 1 fi if ! ps --no-headers --format args ax | egrep -q '^\['; then log_warning_msg "udev does not support containers, not started" exit 0 fi if [ -d /sys/class/mem/null -a ! -L /sys/class/mem/null ] || \ [ -e /sys/block -a ! -e /sys/class/block ]; then log_warning_msg "CONFIG_SYSFS_DEPRECATED must not be selected" log_warning_msg "Booting will continue in 30 seconds but many things will be broken" sleep 30 fi # When modifying this script, do not forget that between the time that the # new /dev has been mounted and udevadm trigger has been run there will be # no /dev/null. This also means that you cannot use the "&" shell command. case "$1" in start) if init_is_upstart 2>/dev/null; then exit 1 fi if mountpoint -q /dev/; then TMPFS_MOUNTED=1 elif [ -e "/dev/.udev/" ]; then log_warning_msg ".udev/ already exists on the static /dev" fi if [ ! -e "/dev/.udev/" -a ! -e "/run/udev/" ]; then warn_if_interactive fi echo > /sys/kernel/uevent_helper move_udev_database if [ -z "$TMPFS_MOUNTED" ]; then unmount_devpts mount_devtmpfs [ -d /proc/1 ] || mount -n /proc fi # clean up parts of the database created by the initramfs udev udevadm info --cleanup-db # set the SELinux context for devices created in the initramfs [ -x /sbin/restorecon ] && /sbin/restorecon -R /dev # /dev/null must be created before udevd is started /lib/udev/create_static_nodes || true log_daemon_msg "Starting the hotplug events dispatcher" "udevd" if udevd --daemon; then log_end_msg $? else log_warning_msg $? log_warning_msg "Waiting 15 seconds and trying to continue anyway" sleep 15 fi log_action_begin_msg "Synthesizing the initial hotplug events" if udevadm trigger --action=add; then log_action_end_msg $? else log_action_end_msg $? fi create_dev_makedev # wait for the udevd childs to finish log_action_begin_msg "Waiting for /dev to be fully populated" if udevadm settle; then log_action_end_msg 0 else log_action_end_msg 0 'timeout' fi ;; stop) log_daemon_msg "Stopping the hotplug events dispatcher" "udevd" if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then log_end_msg $? else log_end_msg $? fi ;; restart) if init_is_upstart 2>/dev/null; then exit 1 fi log_daemon_msg "Stopping the hotplug events dispatcher" "udevd" if start-stop-daemon --stop --name udevd --user root --quiet --oknodo --retry 5; then log_end_msg $? else log_end_msg $? || true fi log_daemon_msg "Starting the hotplug events dispatcher" "udevd" if udevd --daemon; then log_end_msg $? else log_end_msg $? fi ;; reload|force-reload) udevadm control --reload-rules ;; status) status_of_proc /sbin/udevd udevd && exit 0 || exit $? ;; *) echo "Usage: /etc/init.d/udev {start|stop|restart|reload|force-reload|status}" >&2 exit 1 ;; esac exit 0